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[J-linux.git] / tools / perf / util / dwarf-regs.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * dwarf-regs.c : Mapping of DWARF debug register numbers into register names.
4  *
5  * Written by: Masami Hiramatsu <[email protected]>
6  */
7
8 #include <stdlib.h>
9 #include <string.h>
10 #include <debug.h>
11 #include <dwarf-regs.h>
12 #include <elf.h>
13 #include <errno.h>
14 #include <linux/kernel.h>
15
16 /* Define const char * {arch}_register_tbl[] */
17 #define DEFINE_DWARF_REGSTR_TABLE
18 #include "../arch/x86/include/dwarf-regs-table.h"
19 #include "../arch/arm/include/dwarf-regs-table.h"
20 #include "../arch/arm64/include/dwarf-regs-table.h"
21 #include "../arch/sh/include/dwarf-regs-table.h"
22 #include "../arch/powerpc/include/dwarf-regs-table.h"
23 #include "../arch/riscv/include/dwarf-regs-table.h"
24 #include "../arch/s390/include/dwarf-regs-table.h"
25 #include "../arch/sparc/include/dwarf-regs-table.h"
26 #include "../arch/xtensa/include/dwarf-regs-table.h"
27 #include "../arch/mips/include/dwarf-regs-table.h"
28 #include "../arch/loongarch/include/dwarf-regs-table.h"
29
30 #define __get_dwarf_regstr(tbl, n) (((n) < ARRAY_SIZE(tbl)) ? (tbl)[(n)] : NULL)
31
32 /* Return architecture dependent register string (for kprobe-tracer) */
33 const char *get_dwarf_regstr(unsigned int n, unsigned int machine, unsigned int flags)
34 {
35         if (machine == EM_NONE) {
36                 /* Generic arch - use host arch */
37                 machine = EM_HOST;
38         }
39         switch (machine) {
40         case EM_386:
41                 return __get_dwarf_regstr(x86_32_regstr_tbl, n);
42         case EM_X86_64:
43                 return __get_dwarf_regstr(x86_64_regstr_tbl, n);
44         case EM_ARM:
45                 return __get_dwarf_regstr(arm_regstr_tbl, n);
46         case EM_AARCH64:
47                 return __get_dwarf_regstr(aarch64_regstr_tbl, n);
48         case EM_CSKY:
49                 return get_csky_regstr(n, flags);
50         case EM_SH:
51                 return __get_dwarf_regstr(sh_regstr_tbl, n);
52         case EM_S390:
53                 return __get_dwarf_regstr(s390_regstr_tbl, n);
54         case EM_PPC:
55         case EM_PPC64:
56                 return __get_dwarf_regstr(powerpc_regstr_tbl, n);
57         case EM_RISCV:
58                 return __get_dwarf_regstr(riscv_regstr_tbl, n);
59         case EM_SPARC:
60         case EM_SPARCV9:
61                 return __get_dwarf_regstr(sparc_regstr_tbl, n);
62         case EM_XTENSA:
63                 return __get_dwarf_regstr(xtensa_regstr_tbl, n);
64         case EM_MIPS:
65                 return __get_dwarf_regstr(mips_regstr_tbl, n);
66         case EM_LOONGARCH:
67                 return __get_dwarf_regstr(loongarch_regstr_tbl, n);
68         default:
69                 pr_err("ELF MACHINE %x is not supported.\n", machine);
70         }
71         return NULL;
72 }
73
74 #if EM_HOST != EM_X86_64 && EM_HOST != EM_386
75 __weak int get_arch_regnum(const char *name __maybe_unused)
76 {
77         return -ENOTSUP;
78 }
79 #endif
80
81 /* Return DWARF register number from architecture register name */
82 int get_dwarf_regnum(const char *name, unsigned int machine, unsigned int flags __maybe_unused)
83 {
84         char *regname = strdup(name);
85         int reg = -1;
86         char *p;
87
88         if (regname == NULL)
89                 return -EINVAL;
90
91         /* For convenience, remove trailing characters */
92         p = strpbrk(regname, " ,)");
93         if (p)
94                 *p = '\0';
95
96         if (machine == EM_NONE) {
97                 /* Generic arch - use host arch */
98                 machine = EM_HOST;
99         }
100         switch (machine) {
101 #if EM_HOST != EM_X86_64 && EM_HOST != EM_386
102         case EM_HOST:
103                 reg = get_arch_regnum(regname);
104                 break;
105 #endif
106         case EM_X86_64:
107                 fallthrough;
108         case EM_386:
109                 reg = get_x86_regnum(regname);
110                 break;
111         default:
112                 pr_err("ELF MACHINE %x is not supported.\n", machine);
113         }
114         free(regname);
115         return reg;
116 }
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